The Canon EF50mm f/1.2L USM lens is a high-performance, large-aperture standard lens suitable for portraits and other types of photos. It features a large-diameter, high-precision aspherical lens element and an ultrasonic motor (USM) for high-speed and silent autofocus. It also produces a better background blur effect.
This manual explains how to safely handle the EF 50mm f/1.2L USM lens, including precautions for temperature changes, cleaning of electronic contacts, and protection against dust and water. It also describes the lens features such as the ultrasonic motor (USM) and the circular aperture for smooth background blur.
Detailed sections cover lens installation, focus mode switching, infinity distance marking, infrared indicator usage for special film, and recommended accessories like the 72 mm protective filter and the ES‑78 hood. Technical specifications such as minimum aperture, closest focusing distance, magnification, filter size, dimensions and weight are listed at the end. This manual is written in Chinese.
| Minimum aperture | f/1.6 |
|---|---|
| Closest focusing distance | 0.45 m |
| Maximum magnification | 0.15× |
| Filter thread diameter | 72 mm |
| Dimensions (diameter × length) | 85 mm × 65 mm |
| Weight | 590 g |
USM indicates that the lens is equipped with an ultrasonic motor for fast and silent autofocus.